Most reports can be put together using the simplified drop-down of fields, but if the field you are looking for is not in this simple selection you will be able to find it in the add new field section. First choose the table the field belongs to
The drop down 'add a new field' allows you to first select the 'table' where your field lies:
then all the relevant, available fields on that table become available to select:
These fields are listed alphabetically though it may not be obvious from their more code based names which field is the one you are looking for. Please feel free to email in support@synergist.co.uk if you need assistance in this.
Once you have selected the relevant table and field from the dropdowns you can add it by clicking Add this field. The button text will change to Add as row, as that is the normal requirement, but the field is also selected and placed in the simplified field drop-down, allowing you to add as a column should you so wish,